Automatic ventilating-lock.



- .PATENTED APR.16,f1907'.

TING LOCK.

v J. 0. FOSTE AUTOMATIG VENTILA Argmouxon m.

WITNESSES: I

UNITED STATES PATENT OFFICE.

JOHN o. EOsTEE, OF OLEVELANETOHIO, Assionon 0EONE-TH1ED TO s. s. PIPER, or CLEVELAND, 01110.

AUTOMATIC VENTILATING-LOCK.

Specification of Letters Patent.

lratented April 16, 1907.

Application filed April 10, 1906. erial No. 310,968.

To all whom it may concern:

Be it known that 1, JOHN C. FOSTER, a citi- Zen of the United. States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful ln'iprovements in Automatic Ventilating- Locks for Window-Sashes; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My improvement relates to automatic ventilating-locks for window-sashes; and the invention consists in the construction of a lock which will permit either the lower or the upper sash to be raised or lowered within a limited distance in respect. to the other sash, so as to provide a ventilating-opening at the top or the bottom of the window and yet pre vent such an opening to be formed as will be large enough for a person to enter the window through the opening thus provided, all substantially as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of a section of a window with its sashes in crosssection and showing my automatic locking mechanism in working position thereon as it appears when the sashes are closed. Fig. 2 is a vertical sectional ele vation of the two sashes of the window and a portion of the casing therefor and the locking mechanism as it appears when the upper or outer sash has been lowered and is locked on the lower sash also, as hereinafter more fully described.

In the drawings, A represents the lower sash, B the upper sash, and C the windowcasing, all of which parts may be regarded as in usual form. The locking mechanism proper is recessed into the side rail of the upper sash, a recess hbeing shown for this pur pose, and 0 represents a plate which is set over said recess and has a preferably smooth surface or exterior which may be made flush with the said rail if preferred. This plate or part c is provided with holes or openings at its top and bottom or ends adapted to'operatively support the locking-bolt 2 and the controllmg-plunger 3, and said holes have deepening flanges inside to form bearings for the parts mounted therein. A lever D is pivotally supported on ears 4 on the rear of plate 0, and bolt 2 and, plunger 3 are pivotally connected with the'end thereof. Said lever is pivoted nearest plunger 3 at its lower end, so as to give the'greater outward throw to the bolt, and the said lever I) is free to tilt on its pivot according as one position or another of the respective parts at its ends may require.

It will be noticed that plunger 8 is faced off at 5 and 6, below and above upon its outer or exposed end where it is contacted by the rear portion of the lower sash or the locking projection E thereon, according as said plunger is raised or lowered. past said projections, or the projection passes said plunger. It will also be noticed that plate E, which forms projection 7 at its top, is fitted upon the outer edge of the meeting-rail c of the lower sash and that projection 7 stands above the said meeting-rail a, where it is adapted to engage in a notch 8 on the under side of'locking-bolt 2. Now having these parts arranged substantially as shown and described it will be seen that if the sashes are in position, Fig. 1, and it is desired to lower the upper sash for purposes of ventilation from the top of the window the said upper sash is pulled down in the usual way, and as this occurs plunger 3 is struck by projections edge 5 and forced back in its casing. This in turn throws bolt 2 forward in the path of stop projection 7 and the lower sash and forms a limit to the downward movement of the rear sash. recess 8 in-said'bolt and effectually locks the bolt from being withdrawn or pressed back. This then constitutes the limit to downward movement of the upper sash, and resumably the locking mechanism is lace in such position upon the said sash tiat there can be only a limited movement of either sash and not suflicient to form an opening for anyzg 5 one to crawl through into the house, either above or below. On the other hand, assuming that the sashes are in position, as in Fig. 1, and ventilation is desired from the bottom of the window, the lower sash is raised and the locking mechanism automatically assumes locking position as before, projection 7 on said lower sash engaging plunger 3 and forcing it back, at the top, and thereby limits the upward movement of thelower sash. The effect upon the stop mechanism is the same, therefore,

At its limit the stop 7 enters and it in turn throws out bolt 2 r 7 on itsbottom beveled whether one or the other of saidsashes is moved to ventilating tion upon the upper sash determines the dis tance either sash may be opened. It will be noticed, also, that the locking mechanism is recessed into the side rail of the upper sash from the inside, and the recess therefore is not exposed to the outside of the window nor accessible therefrom, and. that effectual looking will automatically occur in any case without attention from any one when either sash is raised. or lowered. When the sashes are closed, the usuallocks can be applied.

If it is desired to open either sash to their full extent, disengagement between projection 7 and bolt 2 is effected and said bolt projection 7 to pass pressed in, thus allowing the bolt.

What I claim is 1. As a new article of manufacture, an automatic ventilating-lock for window-sashes, comprising a pivoted lever, alocking-bolt pivotally connected with one end of said position, and'its posipivotally engaged with I the other end thereof. and a casing carrying I said parts and lever and a plunger constructed with flanged openings for said bolt and plunger, whereby bolt. and plunger are guided and firmlyheld in working position.

2. In automatic ventilating-locks for win (lows, an upper sash and a plunger and a bolt pivotally connected in a recess therein and. a face-plate over said recess having openings through which said plunger and bolt operate, in combination with a lower sash and a projection thereon adapted to press against the end of saidplunger and thereby throw the l bolt forward into the path of said-sash. I Intestimony whereof I tion in the presence of two witnesses.

l JOHN o. FOSTER.

Witnesses:

R. B. MosER, (J. A. SELL.

sign this speci'lica 

